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MCP verified MIT Self-run

Claude Screen Mcp

mcp-lfzds4399-cpu-claude-screen-mcp · by lfzds4399-cpu

Read-only MCP server for cross-platform screenshots, OCR, and screen-change detection.

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Install

$ agentstack add mcp-lfzds4399-cpu-claude-screen-mcp

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

Verified badge

Passed review? Show it. Paste this badge into your README, it links to the public security report.

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[![AgentStack Verified](https://agentstack.voostack.com/badges/verified.svg)](https://agentstack.voostack.com/security/report/mcp-lfzds4399-cpu-claude-screen-mcp)

Reliability & compatibility

✓ Security review passed
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Declared compatibility

Claude CodeClaude DesktopCursorWindsurf

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.

How agent discovery & health will work →
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About

claude-screen-mcp

An MCP server that exposes read-only screen state. Capture, OCR, and change detection only — no input control.

[](LICENSE) [](package.json) [](https://modelcontextprotocol.io) [](https://github.com/lfzds4399-cpu/claude-screen-mcp/actions/workflows/ci.yml)

Quick start

git clone https://github.com/lfzds4399-cpu/claude-screen-mcp
cd claude-screen-mcp
npm install
npm run build

claude mcp add screen -- node "$(pwd)/dist/index.js"

Restart the MCP host after registration.

Tools

| Tool | Purpose | |---|---| | screenshot | Capture a full display and resize the image result. | | screenshot_region | Capture a rectangular region. | | list_displays | Enumerate connected displays. | | list_windows | List visible top-level windows with optional title filter. | | read_screen_text | Run OCR on the full display or a region. | | find_text_on_screen | Search OCR text and return matching bounding boxes. | | screenshot_if_changed | Capture only when perceptual-hash distance exceeds a threshold. | | get_screen_diff | Return hash-distance diagnostics without an image. | | wait_for_change | Poll until the screen changes or a timeout elapses. | | record_screen | Sample a short interval and return deduplicated keyframes. |

Platform support

Windows 10+ is the primary target and is exercised on every release. macOS 11+ and Linux (X11 and Wayland) pass CI and smoke tests but are not regularly exercised. Window enumeration on macOS and Linux requires platform tooling; multi-monitor display enumeration is supported on Windows.

Security and privacy

All processing is local. No screenshot, OCR text, or telemetry leaves the machine; the only network call is the initial Tesseract language data download.

OCR output is untrusted input. Text rendered on screen may attempt to influence the model. Treat output as user-supplied data and avoid auto-executing commands derived from it. Scope read_screen_text to a window when full-desktop capture is not required.

Configuration

| Variable | Default | Purpose | |---|---|---| | SCREEN_MCP_LOG_LEVEL | info | debug, info, warn, or error. | | SCREEN_MCP_OCR_LANGS | eng+chi_sim | Tesseract language list (allowlist enforced). |

The first OCR call downloads language data (~10MB per language); subsequent calls reuse the local cache.

Development

npm install
npm run build
npm test
node tests/e2e-wire.mjs

Roadmap

  • screenshot_window(title) for direct single-window capture.
  • Improved multi-display enumeration on macOS and Linux.

License — MIT, see [LICENSE](LICENSE).

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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